Steerable catheter having puller wire with shape memory

Details Steerable catheter having puller wire with shape memory Steerable catheter having puller wire with shape memory

1993-05-11

1995-01-24

Kamm, William E.

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical energy applicator

607145, A61N 105

Patent

active

053839234

ABSTRACT:
A steerable catheter, which is adapted to be inserted into a body lumen, comprises a symmetrical cylindrical control handle, an elongate tubular catheter body, and a flexible catheter tip having a lumen offset from the axis of the catheter tip. The control handle comprises a housing having a piston chamber at its distal end. A piston is mounted in the piston chamber and is afforded lengthwise movement. The proximal end of the catheter body is fixedly attached to the distal end of the piston. A puller wire made of nickel-titanium alloy having shape memory is attached to the housing and extends through the piston, through and coaxial with the catheter body and into the offset lumen of the catheter tip where it is attached to the wall of the catheter tip. Lengthwise movement of the piston relative to the housing results in deflection of the catheter tip.

REFERENCES:
patent: Re34502 (1994-01-01), Webster, Jr.
patent: 3485234 (1969-12-01), Stevens
patent: 3890977 (1975-06-01), Wilson
patent: 4586923 (1986-05-01), Gould et al.
patent: 4603705 (1986-08-01), Speicher et al.
patent: 4925445 (1990-05-01), Sakamoto et al.
patent: 4960134 (1990-10-01), Webster
patent: 4984581 (1991-01-01), Stice
patent: 5231989 (1993-08-01), Middleman et al.
patent: 5238005 (1993-08-01), Imran
"Systematizing the Application of Shape Memory", Duerig et al.

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